ADC and XDC Specialist Services: From Synthesis to Signal

ADC and XDC Specialist Services: From Synthesis to Signal

End-to-end expertise in antibody drug conjugate services and XDC manufacturing, from highly potent drug linker and payload synthesis to bioconjugation and bioanalysis.

Advancing Complex Biotherapeutics

Antibody Drug Conjugates (ADCs) and other novel bioconjugates (XDCs) unite the targeting precision of antibodies and other biologic carriers with the therapeutic strength of small molecules.  

XDCs span multiple conjugate formats, including polymer-drug, oligo-drug and nanoparticle-drug conjugates, alongside classical ADCs. Developing and manufacturing these sophisticated biotherapeutics demands a high level of integration between chemistry, biology, and analytics. 

Ardena provides a coordinated ADC and XDC platform that combines drug linker and payload synthesis, conjugation, purification, and bioanalytical testing under one quality and regulatory framework. With GMP high containment capabilities and advanced bioanalytical expertise, we support safe scale-up and deliver robust data packages aligned with regulatory expectations.

Integrated ADC and XDC Platform

Ardena’s multidisciplinary approach connects in house expertise with trusted partners to deliver complete ADC/XDC development and manufacturing support within one coordinated framework.

  • Drug linker and payload synthesis developed and manufactured with GMP capabilities for highly potent APIs 
  • Bioconjugation chemistry performed in Ardena’s precision medicine cleanroom facility
  • Lyophilization, packaging and labeling managed through established partner collaborations 
  • Clinical supply and cold chain logistics 
  • GLP Bioanalysis delivered by Ardena’s analytical scientists 
  • CMC regulatory support provided by experienced regulatory specialists in Europe and the US 

This integrated model ensures efficiency, data integrity, and regulatory alignment from early development through clinical supply. 

Drug Linker and Payload

Drug Linker and Payload

Ardena develops and manufactures high potency payloads and drug linkers, combining advanced small molecule chemistry with strict containment and quality control. 

Key capabilities include: 

  • Safe handling of OEB5 compounds (OEL >0.1 µg/m³ < 1 µg/m³) and readiness for OEB6 (OEL >0.01 µg/m³ < 0.1 µg/m³) operations by 2026 
  • Expertise in enzymatically cleavable and click chemistry linkers 
  • Preparative HPLC purification using LC200 systems 
  • GMP compliant synthesis and analytical release testing 
  • Very broad range of organic chemistry expertise 

Bioconjugation Chemistry

Bioconjugation Chemistry

Ardena performs precise and scalable conjugation of antibodies, proteins, peptides, and polymer systems with highly potent payloads under GMP conditions. We support single and dual-payload constructs, including cytotoxic payloads and oligonucleotide payloads (AOCs). 

Technical highlights:

  • Proven experience in antibody, polypeptide, polymer and nanoparticle conjugation
  • Process optimisation to control drug-to-antibody ratio (DAR), conjugation heterogeneity, yield and robustness 
  • Tangential flow filtration (TFF) and chromatographic purification for removal of free payloads and catalysts
  • Scalable processes supporting volumes from laboratory to pilot production
  • GMP compliant synthesis and analytical release testing

Drug Product and Clinical Supply

Drug Product and Clinical Supply

Ardena supports GMP clinical manufacturing of ADCs and XDCs, ensuring controlled handling and fill-finish of complex conjugates.

Our infrastructure and partner network enable securecompliant and temperature-controlled clinical supply across development phases. 

 Capabilities include: 

  • GMP clinical manufacturing of ADCs and XDCs  
  • Aseptic fill-finish and lyophilisation
  • Stability studies and release testing
  • Packaging, labelling and cold chain logistics

GLP Bioanalysis and Biomarkers

GLP Bioanalysis and Biomarkers

Ardena’s comprehensive bioanalytical service includes quantification of all ADC molecular entities, immunogenicity and associated biomarkers.

Ardena’s analytical labs are fully GLP compliant, supporting preclinical and clinical trials, helping you navigate through all stages of development. 

Core competencies include:

  • Pharmacokinetics of total antibody, ADC, conjugated and free payload
  • Immunogenicity
  • Biomarker analyses: soluble, cellular and genomic biomarkers
  • Expertise in multiple modalities

CMC Regulatory Support

CMC Regulatory Support

ADC and XDC programs require CMC strategies that reflect conjugate complexity, including control of heterogeneity, potency, stability and analytical characterisation. Ardena supports clients with CMC documentation and regulatory-eady data packages aligned with clinical development needs and agency expectations in Europe and the US. 

Support includes: 

  • CMC documentation to support regulatory submissions  
  • Input on critical quality attributes and control strategies for conjugates 
  • Technical writing support across chemistry, conjugation, manufacturing and bioanalysis 

Emerging Modalities

Emerging Modalities

ADCs represent only one segment of a rapidly evolving conjugate field. Building on our expertise in linker and payload chemistry, bioconjugation and bioanalysis, Ardena supports developers advancing next-generation XDC platforms. 

Our experience extends to emerging conjugate formats, including: oligonucleotide conjugates, polymer-drug conjugates, nanoparticle-drug conjugates and Immune Stimulating Antibody Conjugates (ISACs).

By combining our strengths in drug linker chemistry, nanomedicine formulation, and bioconjugation, we enable the development of next generation targeted therapies.

Related resources

Our expert team members share their deep, scientific understanding and insights into drug substance development and manufacturing.

Your molecule, your journey, our mission.

Get in touch to see how we can craft your path to the clinic with dedicated capabilities.

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